Spiral cutting tool



FIG. 1 is a perspective view of the claimed design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a third side view thereof;

FIG. 5 is a fourth side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken line disclosure shown supperimposed on continuous claimed surfaces in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a spiral cutting tool, as shown and described. 